\begin{tikzpicture}
    \pgfmathsetmacro{\R}{1.5}
    \pgfmathsetmacro{\r}{0.9}

    \begin{scope}[xshift=2cm, yshift=1.6cm]
        \tkzDefPoints{0/0/a1, \r/0/a2}
        \tkzDrawSegments[xianduan={below=0pt}](a1,a2)
        \tkzLabelSegment[above](a1,a2){$R_2$}
    \end{scope}

    \tkzDefPoints{0/0/O_1, \R/0/A}
    \tkzDefPoint(120:\R){B}
    \tkzDefPoint(60:\R){M}

    \tkzDrawPoint(O_1)
    \tkzDrawArc[thick](O_1,A)(B)
    \tkzDrawSegment[red](O_1,M)
    \tkzLabelSegment[pos=.7, below, xshift=.3em](O_1,M){$R_1$}
    \tkzLabelPoints[below](O_1)
    \tkzLabelPoints[below left](A)
    \tkzLabelPoints[above](B)

    % 1
    \tkzDefPoints{\R+\r/0/O_2}
    \tkzDrawSegment(O_1, O_2)
    \tkzDrawPoint(O_2)
    \tkzLabelPoints[below](O_2)

    % 2
    \tkzDefShiftPoint[O_2](320:\r){C}
    \tkzDrawArc[thick](O_2,A)(C)
    \tkzLabelPoints[below](C)
\end{tikzpicture}

